Installation
Installation Manual
25
ENGLISH
Cut the pipes and the cable
- Use the accessory piping kit or the pipes pur-
chased locally.
- Measure the distance between the indoor
and the outdoor unit.
- Cut the pipes a little longer than measured distance.
- Cut the cable 1.5m longer than the pipe length.
Burrs removal
- Completely remove all burrs from the cut
cross section of pipe/tube.
- Put the end of the copper tube/pipe to down-
ward direction as you remove burrs in order
to avoid to let burrs drop in the tubing.
Flaring work
- Carry out flaring work using flaring tool as
shown right.
Firmly hold copper tube in a bar(or die) as indi-
cated dimension in the table above.
Pipe welding
- Insert and weld the pipe.
- Always make sure to flow Nitrogen at
0.2kgf/cm
2
within the pipe when welding.
- If the welding is done without flowing Nitrogen,
it can generate a thick oxidized coating within
the pipe to interfere with normal operation of
valve and compressor etc.
Insulation
- Use rubber foamed insulation material
(EPDM, NBR) with high thermal resistance.
- When installed in humid environment, use
thicker insulation material than usual.
- Insert the insulation material within the prod-
uct as deep as possible.
h
The thickness of the above insulation material is
based on thermal conduction rate of 0.036W/m°C.
Pipe
Reamer
Point down
Nitrogen
Copper
tube
90°
Slanted Uneven Rough
Nitrogen
Nitrogen
Panel
Inside product
Insulation
Copper
tube
Copper tube
Direction of Nitrogen
Regulator
Taping
Valve
Nitrogen
Nitrogen
Nitrogen
Refrigerant Piping
CAUTION
There is no pump-down function because Indoor is the only heating unit. After vacuum drying, recharge the refrigerant.
Unit : mm(inch)
Pipe
“A”
Gas
Liquid
Gas
Liquid
15.88(5/8)
9.52(3/8)
1.6~1.8
(0.63~0.71)
1.5~1.7
(0.59~0.67)
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Classification
Thickness
Liquid pipe(Ø9.52)
t9 or above
Gas pipe(Ø22.2)
t19 or above
Summary of Contents for AHNW166T0
Page 73: ......
